Enhancement of Heat Transfer in a Rouletted Copper Tube Employing Delta Winglet Twirled Type Insert

Mohammad Taukir Hossain, Nesar Ali and Muhammad Sadekul Karim
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Mohammad Taukir Hossain: Chittagong University of engineering & Technology
Nesar Ali: Chittagong University of Engineering & Technology
Muhammad Sadekul Karim: Chittagong University of Engineering & Technology

European Journal of Engineering and Technology Research, 2018, vol. 3, issue 5, 47-51

Abstract: Heat transfer is a process or a system of thermal engineering that concerns the generation, use, conversion, transfer, internal or external molecular formation and exchange of thermal energy (heat) between physical systems. The research work has been experimented for the turbulent flow heat transfer in a tube having delta winglet twisted tape and then separately with water as working fluid. The test section consisted of a circular copper tube of 26.6 mm inner diameter, 900 mm length with five K-type thermocouples. Bulk temperature and pressure drops have been measured. Material of both the delta winglet twisted tape insert was stainless steel. Delta winglet twisted tape insert had a length of 795mm, width of 20mm, thickness of 2mm, pitch length of 120mm, twist ratio of 6 while wire coil insert had the same length as that of delta winglet twisted tape insert, wire diameter of 1mm, mean coil diameter of 22mm and pitch length of 30mm. Heat transfer rate, convective heat transfer coefficient, Nusselt’s number, friction factor and heat transfer efficiency have been calculated to analyze heat transfer performance of circular copper tube fitted with or without inserts in turbulent regimes (4000

Keywords: Turbulent Flow; Delta Winglet; Twisted Tape; Bulk Temperature; Reynold’s Number and Nusselt’s Number (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:epw:ejeng0:v:3:y:2018:i:5:id:60743

DOI: 10.24018/ejeng.2018.3.5.743

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